239
INTERNAL STRAINS IN GUN FORGINGS,
Muzzle Slice.
Interior diameter, 4".18; exterior diameter, 8".58. Original diameters of rings in the slice.
Rings.	Diameters.		
	A.	B.	Mean.
1		Inches. 4.3345 5.1285 7.1553 8.2936	Inches. 4.3360 5.1311 7.1471 8.2867	Inches. 4.33525 5.1298 7.1512 8.29015
			
3				
4				
			
Rings 1 and 4 detached; rings 2 and 3 in the slice.
Rings.		Diameters.	
	A.	B.	Mean.
1 detached		Inches. 4.3396	Inches. 4.3415	Inches. 4.34055
2		5.1273 7.1546 8.2842	5.1301 7.1465 8.2925	5.1287 7.15055 8.28835
3				
4 detached				
RINGS ALL DETACHED.
2 detached		5.1308	5.1311	5.13095
3 detached		7.1522 j	7.1436	7.1479
Muzzle strains released.
Rings.	Diameters.		
	A.	B. Inch. +. 0055 -.0010 --.0006 +.0058	Mean.
1 detached		Inch. +.0051 —.0012 -.0007 -.0094		Inch. +.0053 -.0011 -.00065 -.0018
			
4 detached				
SECOND TO THIRD PHASE.			
2 detached			+ .0035	+.0010	+ .00225
3 detached		-.0024	-.0029	-.00265
FIRST TO THIRD PHASE.			
2 detached		+.0023	.0000	.00115
3 detached		-.0031	-.0035	-.0033